CN206557562U - A kind of on off state logic judgment equipment - Google Patents
A kind of on off state logic judgment equipment Download PDFInfo
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- CN206557562U CN206557562U CN201720222042.9U CN201720222042U CN206557562U CN 206557562 U CN206557562 U CN 206557562U CN 201720222042 U CN201720222042 U CN 201720222042U CN 206557562 U CN206557562 U CN 206557562U
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- point position
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- 238000000034 method Methods 0.000 abstract description 4
- 238000001514 detection method Methods 0.000 abstract 1
- 230000011664 signaling Effects 0.000 description 4
- 230000003111 delayed effect Effects 0.000 description 2
- 238000001914 filtration Methods 0.000 description 2
- 230000005540 biological transmission Effects 0.000 description 1
- 238000009933 burial Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 230000001939 inductive effect Effects 0.000 description 1
- 230000001052 transient effect Effects 0.000 description 1
Abstract
The utility model, which is related to, discloses a kind of electric switch state logic judgment equipment.Characterized in that, the equipment includes：Switch closes position signal receiving device, and position signal is closed for receiving switch；Switch point position signal receiving device, for receiving switch point position signal；Switch cubicle useful signal reception device, the signal of divide-shut brake condition is met for receiving switch；And judgment means, for closing position signal and switch point position signal according to the switch, it is made up of to judge on off state the logic of setting；This decision logic is avoided that in former DCS system that simple the close position, point position signal for relying on electric switch carries out the judgement of switch running status, erroneous judgement caused by signal sends and (disappeared) because of unknown cause by mistake by mistake to switch time of day, so as to cause the misoperation of flogic system, switch by mistake, unit load RB even chasers may be caused.Determination methods of the present utility model, the signal for making full use of cabinet generally to provide, comprehensive detection truly judges on off state.
Description
Technical field：
The utility model is related to DCS system and PLC system control field, is used for electric switch state more particularly to one kind
Logic judgment equipment.
Background technology
In power plant, cabinet, which is generally provided to DCS or the signal of PLC system (hereinafter referred to as control system), to be had
" switch closes position signal ", " switch point position signal ", " switch cubicle useful signal " etc..Typically electric switch is judged in the controls
State is directly to draw the position signalling of switch cubicle, without carrying out logical process.Have common following two straight in actual applications
Connect reference example：
One kind is that " switch closes position signal ", " switch point position signal " are introduced into control system：" switch closes position signal " deposits
Then it is being judged as " switch operation "；" switch point position signal " is present, then is judged as " switch is stopped transport ".
It is another that " switch closes position signal " is only introduced into control system, and take " non-" to obtain " switch is stopped transport " in logic.
If " switch closes position signal " is present, it is judged as " switch operation ", if being not present, is judged as " switch is stopped transport ".
Both the above electric switch state determination methods, based on cabinet send out position signalling, transmission line and
It is completely correct that DCS receives loop.Conventional DCS signals inquiry voltage is very low (generally 33VDC and 48VDC), if contact
Contact resistance is slightly aoxidized, contact resistance increase, be possible to when DCS system low-voltage inquire about occur it is obstructed, once position letter
Number send out by mistake, control system will carry out false judgment, the instruction of output error (such as switching or unit RB).It is electromechanical with the air inducing of power plant
Exemplified by air cock, under power plant's normal duty operating mode, if the " RUN " blackout of an air-introduced machine, will occur " load is returned
Boat ".If unilateral air and flue system operation, will cause unit tripping.
Therefore, the signal that can be provided using existing cabinet, necessary Logical Configuration is carried out in control system, it is to avoid
The control system of having carried out the coffin upon burial by mistake of electric switch position signalling improves equipment dependability to equipment misoperation.
Utility model content
The purpose of this utility model is to provide a kind of on off state logic judgment equipment, and the equipment closes position signal by switching
Reception device, switch point position signal receiving device, switch cubicle useful signal reception device receive switch and close position signal, switch respectively
Point position signal, switch cubicle useful signal judge after carrying out Logical Configuration to above-mentioned signal by judgment means again, to obtain
Show the logical signal of on off state, realize that position signalling truly reflects electric switch virtual condition.
To achieve these goals, a kind of on off state of the utility model offer judges equipment, it is characterised in that the equipment
Including：Switch closes position signal receiving device, position signal, switch point position signal receiving device is closed for receiving switch, for receiving
Switch point position signal, switch cubicle useful signal reception device, signal and the judgement of divide-shut brake condition are met for receiving switch
Device, for closing position signal and switch point position signal according to the switch, is made up of to judge on off state the logic of setting.
Preferably, the judgment means are included：NOT gate, for the switch point position signal of reception, and to the switch point position letter
Number carry out not operation；With door, two input is respectively used to the switch point position signal received and the switch useful signal received,
And the signal is carried out with operating；OR gate, two input be respectively used to access the switch close position signal and carry out with
Switch point position signal after operation, and both are carried out or operated, to obtain showing the logical signal of on off state；First prolongs
When device, first delayer is connected to the switch and closes between position signal receiving device and the OR gate, the switch for reception
Position signal is closed, to avoid switch from closing the erroneous judgement that position signal jitter instantaneously occurs；Second delayer, second delayer is connected to
The switch divides position signal receiving device and described between door, for the switch point position signal of reception, to avoid switching point position
The erroneous judgement that signal jitter instantaneously occurs.
Preferably, first delayer and the second delayer delay time are 0.1 second.
Preferably, the equipment also includes control device, for sending tripping operation or state to switch according to the on off state
Switching command.
Preferably, the control device is PLC or DCS.
By above-mentioned technical proposal, can be closed by a switch point position signal receiving device, switch position signal receiving device and
Switch cubicle useful signal reception device is respectively received switch point position signal, switch and closes position signal and switch cubicle useful signal, sentences
Disconnected device is posed according to above-mentioned three's signal by the logic of setting carries out the judgement of on off state, overcomes only by drawing away pass
Cabinet conjunction position signal judge on off state, without carry out logic judgment defect, it is ensured that judge equipment accuracy and can
By property.
Under normal circumstances, switch closes position signal in the presence of then judgement " switch operation ".To avoid switch from closing position signal jitter wink
When the erroneous judgement that occurs, therefore delay 0.1 second.
Once switch closes position blackout, and switchs a point position signal and do not occur, if now the useful signal of switch cubicle is still deposited
Showing that switch conjunction position signal is obstructed for some reason, be then still judged as " switch operation ".
Switch closes position blackout, and a switch point position signal sends, is then determined as " switch off-duty ".
Switch closes position blackout, and a switch point position signal is not sent, if the useful signal of switch cubicle disappears, judgement " is opened
Close off-duty ".To avoid the erroneous judgement that switch point position signal transient occurs, therefore it is delayed 0.1 second.
After above logic judgment, the switch run signal of output can truly reflect the virtual condition of switch, it is to avoid because of list
One contact it is instantaneous it is obstructed cause control system erroneous judgement so that by mistake hair tripping operation or switching command.Can be as weight in control system
Want protection, the interlocking foundation of equipment.
Other features and advantages of the utility model will be described in detail in subsequent embodiment part.
Brief description of the drawings
Accompanying drawing is to be further understood for providing to of the present utility model, and constitutes a part for specification, and following
Embodiment be used to explain the utility model together, but do not constitute to limitation of the present utility model.In the accompanying drawings：
Fig. 1 is the structural representation that a kind of on off state that the utility model embodiment is provided judges equipment.
Fig. 2 is that a kind of on off state that the utility model embodiment is provided judges apparatus logic schematic diagram.
Description of reference numerals
100 switches close the switch point position signal receiving device of position signal receiving device 200
The NOT gate of 300 judgment means 310
320 OR gates 330 and door
The delayer of 400 switch cubicle useful signal reception device 510 first
The control device of 520 second delayer 600
Embodiment
Embodiment of the present utility model is described in detail below in conjunction with accompanying drawing.It should be appreciated that herein
Described embodiment is merely to illustrate and explained the utility model, is not limited to the utility model.
In the utility model, in the case where not making opposite explanation, the noun of locality used such as " upper and lower, left and right ",
" inside and outside ", " remote, near " refer to the direction of refer to the attached drawing, therefore, and use direction term is to limit this practicality for illustrating not
It is new.
Fig. 1 shows a kind of basic structure signal on off state logic judgment equipment that the utility model embodiment is provided
Figure, closes position signal receiving device 100, switch point position signal receiving device 200, sentences as shown in figure 1, the equipment can include switch
Disconnected device 300.Wherein, the switch closes position signal receiving device 100 and is used to receive switch conjunction position signal, and the switch point position signal connects
Receiving apparatus 200 is used to receive switch point position signal, and the judgment means 300 close position signal according to switch and switch point position signal is carried out
Logical Configuration simultaneously judges on off state.
Under normal circumstances, the switch conjunction position signal that switch closes the reception of position signal receiving device 100 is " 1 ", represents switch conjunction
Position signal is present, and the switch point position signal that switch point position signal receiving device 200 is received is " 0 ", represents switch point position signal not
In the presence of judgment means 300 judge to draw " switch is in running status " according to above-mentioned signal message；If switch closes position signal and received
It is " 0 " that the switch that device 100 is received, which closes position signal, represents that switch closes position signal and is not present, switch point position signal receiving device 200
The switch of reception point position signal is " 1 ", represents that switch point position signal is present, judgment means 300 judge according to above-mentioned signal message
Draw " switch is in off-duty state ".
Under certain conditions, such as electric switch auxiliary contact failure or secondary cable wiring faults etc., it is possible that
The switch that switch closes the reception of position signal receiving device 100 closes position signal for " 1 ", and switchs a point position signal receiving device 200 and receive
Switch point position signal be also " 1 " situation, then can not directly judge on off state, therefore enter again after the certain Logical Configuration of increase
The judgement of row on off state.
As shown in figure 1, increase includes switch cubicle useful signal reception device 400, for receiving switch cubicle useful signal, open
Pass cabinet useful signal refers to switch in operating position and auxiliary switch power is normal, switchs the normal attonity signal of relay protection, i.e.,
Switch meets the signal of divide-shut brake condition；And the judgment means 300 can include：NOT gate 310, OR gate 320, with door 330.Its
In, NOT gate 310 is used to receive switch point position signal, and carries out not operation to the switch point position signal；With door 330, two is defeated
Enter the switch point position signal that end is respectively used to access after switch cubicle useful signal 400 and progress not operation, and both are entered
Row and operation；Two input of OR gate 320 is respectively used to after accessing the switch conjunction position signal and carrying out not operation
Switch point position signal, and both are carried out or operated, to obtain showing the logical signal of on off state.I.e. in switch point position signal
When the switch point position signal that reception device 200 is received is " 0 " (being " 1 " after the not operation of NOT gate 310), and switch cubicle useful signal
When the switch cubicle useful signal that reception device 400 is received is " 1 ", through with being " 1 " after door 330 and operation.No matter now switch is closed
Position signal receiving device 100 receive switch close position signal be " 1 " or " 0 ", by OR gate 320 or operation, logic judgment root
Judge to draw " switch is in running status " according to above-mentioned signal message.It is indicated above closing position blackout once switching, and opens
Close a point position signal not occur, such as now switch cubicle useful signal is still suffered from, show that switch conjunction position signal is obstructed for some reason, logic judgment
Still it is judged as that switch is in running status.
With reference to shown in Fig. 2, specific decision logic is as follows：
1st, switch closes position blackout, and switchs a point position signal and do not occur, if now the useful signal of switch cubicle is still suffered from,
Show that switch conjunction position signal is obstructed for some reason, be then still judged as " switch operation ".
2nd, switch closes position blackout, and a switch point position signal sends, is then determined as " switch off-duty "
3rd, switch closes position blackout, and a switch point position signal does not send, if the useful signal of switch cubicle disappears, judged
" switch off-duty ".
4th, switch closes position signal and sent, no matter the state of switch point position signal and switch useful signal, is judged as " switch
Operation ".
As shown in figure 1, judgment means 300 also include the first delayer 510, first delayer 510 is connected to described open
Close between a signal receiving device 100 and the OR gate 320, for filtering out because electric switch closes the shake of position auxiliary contact
The erroneous judgement break signal caused；And second delayer 520, second delayer 520 is connected to the switch point position signal reception
Device 200 and described between door 330, for filtering out the erroneous judgement letter caused by the shake of electric switch point position auxiliary contact
Number, to avoid the erroneous judgement that switching signal moment occurs, therefore it is delayed 0.1 second by time-delay relay.
As shown in figure 1, the equipment can also include control system 600, for being sent according on off state to relevant device
Operation, tripping operation or switching command, can as equipment the chain foundation of protection, it is ensured that the equipment safety operation control system 600 can
Think PLC or DCS.
Preferred embodiment of the present utility model is described in detail above in association with accompanying drawing, still, the utility model is not limited
Detail in above-mentioned embodiment, can be to skill of the present utility model in range of the technology design of the present utility model
Art scheme carries out a variety of simple variants, and these simple variants belong to protection domain of the present utility model.
It is further to note that each particular technique feature described in above-mentioned embodiment, in not lance
In the case of shield, it can be combined by any suitable means.In order to avoid unnecessary repetition, the utility model is to each
Possible combination is planted no longer separately to illustrate.
In addition, can also be combined between a variety of embodiments of the present utility model, as long as it is not disobeyed
Thought of the present utility model is carried on the back, it should equally be considered as content disclosed in the utility model.
Claims (5)
1. a kind of electric switch state logic judgment equipment, it is characterised in that the equipment includes：
Switch closes position signal receiving device, and position signal is closed for receiving switch；
Switch point position signal receiving device, for receiving switch point position signal；
Switch cubicle useful signal reception device, the signal of divide-shut brake condition is met for receiving switch cubicle useful signal, i.e. switch；
And
Judgment means, for closing position signal and switch point position signal according to the switch, are made up of to judge the logic of setting
On off state.
2. equipment according to claim 1, it is characterised in that the judgment means are included：
NOT gate, not operation is carried out for the switch point position signal of reception, and to the switch point position signal；
With door, two input is respectively used to the switch point position signal received and the switch cubicle useful signal received, and to this
Signal is carried out and operation；
OR gate, two input is respectively used to access the switch point position after the switch closes position signal and carries out and operate
Signal, and both are carried out or operated, to obtain showing the logical signal of on off state；
First delayer, first delayer is connected to the switch and closed between position signal receiving device and the OR gate, is used for
The switch of reception closes position signal, and filter switch closes the erroneous judgement that position signal jitter instantaneously occurs；And
Second delayer, second delayer is connected to the switch point position signal receiving device and described between door, is used for
The switch of reception point position signal, the erroneous judgement that the signal jitter of filter switch point position instantaneously occurs.
3. equipment according to claim 2, it is characterised in that when first delayer and second delayer delay
Between be 0.1 second.
4. equipment according to claim 1 or claim 2, it is characterised in that the equipment also includes control device, for being opened according to
Off status sends tripping operation or state switch command to switch.
5. equipment according to claim 4, it is characterised in that the control device is DCS or PLC.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720222042.9U CN206557562U (en) | 2017-03-08 | 2017-03-08 | A kind of on off state logic judgment equipment |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720222042.9U CN206557562U (en) | 2017-03-08 | 2017-03-08 | A kind of on off state logic judgment equipment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206557562U true CN206557562U (en) | 2017-10-13 |
Family
ID=60362860
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720222042.9U Active CN206557562U (en) | 2017-03-08 | 2017-03-08 | A kind of on off state logic judgment equipment |
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| Country | Link |
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| CN (1) | CN206557562U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107976625A (en) * | 2017-10-31 | 2018-05-01 | 国网河南省电力公司检修公司 | A kind of high voltage direct current Control protection system position of the switch determination methods |
| CN111082525A (en) * | 2019-12-19 | 2020-04-28 | 深圳供电局有限公司 | Intelligent interface device of transformer substation |
-
2017
- 2017-03-08 CN CN201720222042.9U patent/CN206557562U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107976625A (en) * | 2017-10-31 | 2018-05-01 | 国网河南省电力公司检修公司 | A kind of high voltage direct current Control protection system position of the switch determination methods |
| CN107976625B (en) * | 2017-10-31 | 2020-02-07 | 国网河南省电力公司检修公司 | Switch position judgment method for high-voltage direct-current control protection system |
| CN111082525A (en) * | 2019-12-19 | 2020-04-28 | 深圳供电局有限公司 | Intelligent interface device of transformer substation |
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